CN105262851B - One kind being based on shifty DNS retransmission method and system - Google Patents
One kind being based on shifty DNS retransmission method and system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
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Abstract
The present invention relates to computer technical field of domain name resolution, disclose one kind based on shifty DNS retransmission method, this method comprises: creating Forward Area on local dns server；Different pass-through modes is created on the Forward Area, the pass-through mode includes tri- kinds of pass-through modes of first, only and no；Different forwarding server Selection Strategies is created under three kinds of pass-through modes, the forwarding server Selection Strategy includes tri- kinds of modes of RTT, ORDER and WEIGHT；After client issues request, returned the result by the local dns server according to different strategies.The present invention provides a kind of shifty DNS retransmission method, the local dns server is enabled to be forwarded inquiry according to specified method and strategy, to realize the diversification and flexibility of domain name mapping process, more extensive domain name mapping requirement can satisfy.
Description
Technical field
The present invention relates to computer technical field of domain name resolution, more particularly to one kind to be based on shifty DNS retransmission method
And system.
Background technique
DNS (Domain Name System, domain name system), one mutually mapped on internet as domain name and IP address
A distributed data base is able to use family and more easily accesses internet, remembers can be directly read by machine without spending
IP number string.By host name, the process for finally obtaining the corresponding IP address of the host name is called domain name mapping (or host name solution
Analysis).
Currently, a local dns can select first or only for different areas respectively, to each client
Identical forwarding inquiries processing is all made in domain-name information request, and the parsing of domain name can not be carried out according to specified method and strategy,
Process of analysis lacks flexibility and diversity, is unable to satisfy wider domain name mapping requirement.
Summary of the invention
The technical problem to be solved by the invention is to provide one kind to be based on shifty DNS retransmission method and system, with solution
Certainly dns server can not be according to specified method and sequence carry out the parsing of domain name, process of analysis lacks flexibility and diversity
The problem of.
The technical proposal adopted by the invention to solve the above technical problems is that providing a kind of based on the shifty forwarding side DNS
Method, the method comprising the steps of:
S1, Forward Area is created on local dns server, the domain name mapping that client is sent is forwarded to specified service
Device；
S2, tri- kinds of pass-through modes of first, only and no are created on the Forward Area；
S3, tri- kinds of forwarding clothes of RTT, ORDER and WEIGHT are created under tri- kinds of pass-through modes of described first, only and no
Business device Selection Strategy；
S4, the Forward Area strategy is configured according to the pass-through mode and forwarding server Selection Strategy, received described
After client request, forwarding parsing result is returned according to the different Forward Area strategies.
Preferably, in step S2, the first pass-through mode comprising steps of
S201, the local dns server receive the domain name mapping for belonging to the Forward Area that the client is sent and ask
It asks；
S202, domain name analysis request is sent on given server, and judges whether the server is reachable；
S203, if so, then returning to the domain-name information of the client request；
If S204, nothing, recursive query is carried out, and recurrence result is returned into the client.
Preferably, in step S2, the only pass-through mode comprising steps of
S211, the local dns server receive the domain name mapping for belonging to the Forward Area that the client is sent and ask
It asks；
S212, domain name analysis request is sent on given server, and judges whether the server is reachable；
S213, if so, the response result of the server is then back to the client；
If S214, nothing, corresponding type of error is returned to, the local dns server stops recursive query.
Preferably, in step S2, when using the no pass-through mode, the local dns server sends out the client
Domain name mapping request out carries out recursive query, and without first the only mode using father area, recurrence result is back to
Client.
Preferably, in step S3, when in Forward Area, destination server is 1 or more, described RTT, ORDER and WEIGHT turn
Hair server Selection Strategy specifies transfer sequence according to round-trip delay, user respectively and forwarding server weight definition is each is made
It with the priority orders of destination server, is inquired according to the priority orders, if server return is requested
Domain-name information then stops inquiring；If the high server failure of the priority, the server of a sequential query time priority.
On the other hand, the present invention provides one kind and is based on shifty DNS repeater system, the system comprises:
Creating unit, for creating Forward Area on local dns server；
Retransmission unit, the domain name mapping for belonging to the Forward Area for sending the client are requested by the local
Dns server is forwarded on given server；
Whether query unit has requested domain-name information for inquiring in each server；
Tactful configuration unit, for configuring the Forward Area plan according to the pass-through mode and forwarding server Selection Strategy
Slightly, after receiving the client request, forwarding parsing result is returned according to the different Forward Area strategies.
Preferably, the retransmission unit includes judging unit, for judging whether the given server is reachable.
Preferably, the retransmission unit further includes first retransmission unit, only retransmission unit, according to the judging unit,
If the given server is reachable,
When using first retransmission unit forwarding, the domain-name information of the client request is returned；
When using only retransmission unit forwarding, the response result of the server is back to the client；
If the given server without corresponding domain-name information,
When using first retransmission unit forwarding, recursive query is carried out, and recurrence result is returned into the client
End；
When using only retransmission unit processing, corresponding type of error is returned to, the local dns server stopping is passed
Return inquiry.
Preferably, the retransmission unit further includes no unit, is issued by the local dns server to the client
Domain name mapping request carry out recursive query, without using father area first only mode, recurrence result is back to visitor
Family end.
Preferably, the query unit includes RTT query unit, ORDER query unit and WEIGHT query unit, difference
The priority of transfer sequence and each the used destination server of forwarding server weight definition is specified according to round-trip delay, user
Sequentially, it is inquired according to the priority orders, if the server returns to requested domain-name information, stops inquiring；
If the high server failure of the priority, the server of a sequential query time priority.
Detailed description of the invention
Fig. 1 is the flow chart based on shifty DNS retransmission method in a preferred embodiment of the present invention；
Fig. 2 is the structure chart based on shifty DNS repeater system in a preferred embodiment of the present invention.
Specific embodiment
The following examples are only intended to illustrate the technical solution of the present invention more clearly, and cannot be used as a limitation the limitation present invention
Protection scope.Specification subsequent descriptions are to implement better embodiment of the invention, and so the description is to illustrate the present invention
Rule for the purpose of, the range that is not intended to limit the invention.Protection scope of the present invention is when view appended claims institute
Subject to defender.
The present invention is described in further details in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, being a preferred embodiment of the present invention, a kind of shifty DNS retransmission method, the party are disclosed
Method includes step:
S1, Forward Area is created on local dns server, the domain name mapping that client is sent is forwarded to specified service
Device；
S2, tri- kinds of pass-through modes of first, only and no are created on Forward Area；
S3, tri- kinds of forwarding servers of RTT, ORDER and WEIGHT are created under tri- kinds of pass-through modes of first, only and no
Selection Strategy；
S4, Forward Area strategy is configured according to pass-through mode and forwarding server Selection Strategy, after receiving client request,
Forwarding parsing result is returned according to different Forward Area strategies.
In the present embodiment, forwarded using tri- kinds of pass-through modes of first, only and no and tri- kinds of RTT, ORDER and WEIGHT
Server Selection Strategy carries out tactful configuration to the forwarding for the domain name mapping request that client is sent, so that dns server is to domain
The parsing of name can be carried out according to specified method and sequence, to realize the diversification of domain name mapping process, domain name mapping
Process is more flexible, can satisfy more extensive domain name mapping requirement.
Further, in step S2, first pass-through mode comprising steps of
S201, local dns server receive the domain name mapping request for belonging to Forward Area that client is sent；
S202, it translates domain names into request and is sent on given server, and judge whether server is reachable；
S203, if so, then returning to the domain-name information of client request；
If S204, nothing, recursive query is carried out, and recurrence result is returned into client.
Further, in step S2, only pass-through mode comprising steps of
S211, local dns server receive the domain name mapping request for belonging to Forward Area that client is sent；
S212, it translates domain names into request and is sent on given server, and judge whether server is reachable；
S213, if so, the response result of server is then back to client；
If S214, nothing, corresponding type of error is returned to, local dns server stops recursive query.
Further, in step S2, when using no pass-through mode, domain name solution that local dns server issues client
Analysis request carries out recursive query, and without first the only mode using father area, recurrence result is back to client.
In the present embodiment, by tri- kinds of pass-through modes of first, only and no, the domain name solution required different disposal is completed
The processing of request is analysed, first pass-through mode is forwarded analysis request, and recursive query determines parsing result, only forwarding
Mode is only forwarded to given server, determines parsing result, if nothing as a result, if return to error message, no pass-through mode is only
Recursive query is carried out without being forwarded to server, and returns to query result, the request that different forwardings can be required in this way
Different disposal is carried out, parsing result is quickly obtained, saves resource and time.
Further, in step S3, when in Forward Area, destination server is 1 or more, RTT, ORDER and WEIGHT forwarding
Server Selection Strategy specifies transfer sequence according to round-trip delay, user respectively and forwarding server weight definition is each is used
The priority orders of destination server, are inquired according to priority orders, if server returns to requested domain-name information,
Stop inquiry；If the high server failure of priority, the server of a sequential query time priority.
In the present embodiment, RTT forwarding server Selection Strategy is most short for highest priority with round-trip delay, and so on,
Local dns server determines the round-trip delay to each server by test request according to rule, to ensure that RTT mode
Real-time, arbitrarily upper test request time of return is different and adjust by RTT so that server precedence with time of return difference and
Corresponding variation；ORDER forwarding server Selection Strategy is then the priority orders for providing to determine each server by user；
WEIGHT forwarding server Selection Strategy is interviewed by each server of weight calculation that user specifies to each given server
The ratio asked determines priority according to the height of ratio, these three forwarding server Selection Strategies are directed to different domain name solutions
It analyses situation to use, specifies the sequence of parsing, realize the diversification of domain name mapping, be allowed to more flexible, use is more extensive.
It will appreciated by the skilled person that implement the method for the above embodiments be can be with
Relevant hardware is instructed to complete by program, the program can store in computer-readable storage medium, should
Program when being executed, each step including above-described embodiment method, and the storage medium may is that ROM/RAM, magnetic disk,
CD, storage card etc..Therefore, relevant technical staff in the field will be understood that corresponding with method of the invention, and the present invention is also
It simultaneously include that one kind is based on shifty DNS repeater system, referring to fig. 2, correspondingly with above method step, the system packet
It includes:
Creating unit, for creating Forward Area on local dns server；
Retransmission unit, the domain name mapping request for belonging to Forward Area for sending client are turned by local dns server
It is sent on given server；
Whether query unit has requested domain-name information for inquiring in each server；
Tactful configuration unit, for receiving according to pass-through mode and forwarding server Selection Strategy configuration Forward Area strategy
To after client request, forwarding parsing result is returned according to different Forward Area strategies.
In the present embodiment, tactful configuration of described dispensing unit forwarding server Selection Strategy is configured with first/RTT, only/
These strategies of RTT, no, first/ORDER, only/ORDER, first/WEIGHT, only/WEIGHT, according to different configurations
Strategy, obtain forwarding parsing as a result, make dns server to the parsing of domain name can according to specified method and strategy into
Row, to realize the diversification of domain name mapping process, domain name mapping process is more flexible, can satisfy more extensive domain name
Parse requirement.
Further, retransmission unit includes judging unit, for judging whether given server is reachable.
Further, retransmission unit further includes first retransmission unit, only retransmission unit, according to judging unit, if specified
Server is reachable, then
When using the forwarding of first retransmission unit, the domain-name information of client request is returned；
When using the forwarding of only retransmission unit, the response result of server is back to client；
If given server without corresponding domain-name information,
When using the forwarding of first retransmission unit, recursive query is carried out, and recurrence result is returned into the client；
When using the processing of only retransmission unit, corresponding type of error is returned to, local dns server stops recursive query.
Further, retransmission unit further includes no unit, the domain name mapping issued by local dns server to client
Request carries out recursive query, and without first the only mode using father area, recurrence result is back to client.
In the present embodiment, judging unit according to the retransmission unit of selection and is sentenced for judging whether given server is reachable
Disconnected result is forwarded processing, guarantees that each domain name resolution process is more time saving and energy saving, versatile and flexible.
Further, query unit includes RTT query unit, ORDER query unit and WEIGHT query unit, is pressed respectively
Specify the priority of transfer sequence and each the used destination server of forwarding server weight definition suitable according to round-trip delay, user
Sequence is inquired according to priority orders, if server returns to requested domain-name information, stops inquiring；If priority is high
Server failure, then the server of a sequential query time priority.
In the present embodiment, RTT query unit uses RTT forwarding server Selection Strategy, most short for highest with round-trip delay
Priority, and so on, local dns server determines the round-trip delay to each server by test request according to rule,
To ensure that the real-time of RTT mode；ORDER query unit uses ORDER forwarding server Selection Strategy, is advised by user
Surely the priority orders of each server are determined；WEIGHT query unit uses WEIGHT forwarding server Selection Strategy, passes through
The accessed ratio of each server of weight calculation that user specifies to each given server, the height of ratio determine priority
Sequence, according to circumstances judgement use which kind of query unit, specify parsing sequence, realize the diversification of domain name mapping, be allowed to
More flexible, use is more extensive.
Compared with prior art, the present invention provides a kind of shifty DNS retransmission method and systems, are forwarded by establishing
Area configures three kinds of DNS pass-through modes: first pass-through mode, only pass-through mode and no pass-through mode, meanwhile, three kinds of configuration turn
Send out server Selection Strategy: RTT forwarding server Selection Strategy, ORDER forwarding server Selection Strategy and WEIGHT forwarding clothes
Business device Selection Strategy, selects first/RTT, only/RTT, no, first/ORDER, only/ORDER, first/ as needed
WEIGHT, only/WEIGHT strategy, according to different configuration strategies, obtain forwarding parsing as a result, making dns server pair
The parsing of domain name can be carried out according to specified method and sequence, so that the diversification of domain name mapping process is realized, domain name solution
It is more flexible to analyse process, can satisfy more extensive domain name mapping requirement.
It is worth noting that, the foregoing is merely presently preferred embodiments of the present invention, patent of the invention is not thereby limited
Protection scope, the present invention can also carry out the improvement of material and structure to the construction of above-mentioned various components, or use skill
Art equivalent is replaced.Therefore it is all with equivalent structure made by specification and diagramatic content of the invention change, or directly or
Apply to other correlative technology fields indirectly to be similarly all contained in the range of of the invention cover.
Claims (10)
1. one kind is based on shifty DNS retransmission method, which is characterized in that the method includes the steps:
S1, Forward Area is created on local dns server；
S2, tri- kinds of pass-through modes of first, only and no are created on the Forward Area, wherein first pass-through mode is to parsing
Request is forwarded, and recursive query determines parsing result, and only pass-through mode is only forwarded to given server, determines solution
Analysis as a result, if nothing as a result, if return to error message, no pass-through mode only carries out recursive query without being forwarded to server,
And return to query result；
S3, tri- kinds of forwarding servers of RTT, ORDER and WEIGHT are created under tri- kinds of pass-through modes of described first, only and no
Selection Strategy, tri- kinds of Selection Strategies of described RTT, ORDER and WEIGHT respectively indicate suitable according to round-trip delay, the specified forwarding of user
The priority orders of each used destination server of sequence and forwarding server weight definition；
S4, Forward Area strategy is configured according to the pass-through mode and forwarding server Selection Strategy, receives the domain name solution of client
After analysis request, forwarding parsing result is returned according to the different Forward Area strategies.
2. the method as described in claim 1, which is characterized in that in step S2, the first pass-through mode comprising steps of
S201, the local dns server receive the domain name mapping request for belonging to the Forward Area that the client is sent；
S202, domain name analysis request is sent on given server, and judges whether the given server is reachable；
S203, if so, returning to the domain-name information of the client request；
S204, if it is not, then carry out recursive query, and recurrence result is returned into the client.
3. the method as described in claim 1, which is characterized in that in step S2, the only pass-through mode comprising steps of
S211, the local dns server receive the domain name mapping request for belonging to the Forward Area that the client is sent；
S212, domain name analysis request is sent on given server, and judges whether the given server is reachable；
S213, if so, the response result of the given server is back to the client；
S214, if it is not, then return to corresponding type of error, the local dns server stops recursive query.
4. the method as described in claim 1, which is characterized in that in step S2, when using the no pass-through mode, the local
Dns server carries out recursive query to the domain name mapping request that the client issues, and recurrence result is back to client.
5. the method as described in claim 1, which is characterized in that in step S3, in Forward Area, destination server is 1 or more
When, RTT, ORDER and WEIGHT forwarding server Selection Strategy respectively according to round-trip delay, user specify transfer sequence and
The priority orders of each the used destination server of forwarding server weight definition, are looked into according to the priority orders
It askes, if the given server returns to requested domain-name information, stops inquiring；If the high destination server of priority
Failure, the then destination server of a sequential query time priority.
6. one kind is based on shifty DNS repeater system, which is characterized in that the system comprises:
Creating unit, for creating Forward Area on local dns server；
Retransmission unit, the domain name mapping for belonging to the Forward Area for sending client request to be serviced by the local dns
Device is forwarded on given server, and the retransmission unit includes first retransmission unit, only retransmission unit and no unit,
In, first pass-through mode is forwarded analysis request, and recursive query determines parsing result, and only pass-through mode is only to finger
Determine server to be forwarded, determine parsing result, if nothing as a result, if return to error message, no pass-through mode only carries out recurrence and looks into
It askes without being forwarded to server, and returns to query result；
Query unit, for inquiring whether have requested domain-name information in each given server, the query unit includes,
RTT query unit, ORDER query unit and WEIGHT query unit, wherein the RTT query unit, ORDER query unit
With WEIGHT query unit, transfer sequence and each institute of forwarding server weight definition are specified according to round-trip delay, user respectively
Use the priority orders of destination server；
Tactful configuration unit, for receiving visitor according to pass-through mode and forwarding server Selection Strategy configuration Forward Area strategy
After the request at family end, forwarding parsing result is returned according to the different Forward Area strategies.
7. system as claimed in claim 6, which is characterized in that the retransmission unit includes judging unit, described for judging
Whether given server is reachable.
8. system as claimed in claim 7, which is characterized in that according to the judging unit, if the given server is reachable,
Then
When using first retransmission unit forwarding, the domain-name information of the client request is returned；
When using only retransmission unit forwarding, the response result of the given server is back to the client；
If the given server is unreachable,
When using first retransmission unit forwarding, recursive query is carried out, and recurrence result is returned into the client；
When using only retransmission unit processing, corresponding type of error is returned to, the local dns server stops recurrence and looks into
It askes.
9. system as claimed in claim 7, which is characterized in that when the retransmission unit uses no unit forwards, by described
The domain name mapping request that local dns server issues the client carries out recursive query, without using father area first or
Recurrence result is back to client by person's only mode.
10. system as claimed in claim 6, which is characterized in that specify transfer sequence according to round-trip delay, user respectively and turn
Hair server weight defines the priority orders of each used destination server, is inquired according to the priority orders,
If the given server returns to requested domain-name information, stop inquiring；If the high destination server event of priority
Hinder, then the server of a sequential query time priority.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106888277B (en) * | 2017-03-07 | 2023-02-14 | 腾讯科技（深圳）有限公司 | Domain name query method and device |
| CN110474994A (en) * | 2018-05-10 | 2019-11-19 | 中国移动通信集团有限公司 | Domain name analytic method, device, electronic equipment and storage medium |
| CN110602264B (en) * | 2019-09-02 | 2022-05-10 | 中国移动通信集团江苏有限公司 | Method, apparatus, device and medium for transferring domain name resolution address weight information |
| CN111107081B (en) * | 2019-12-17 | 2022-01-11 | 深圳网基科技有限公司 | DPDK-based multi-process DNS service method and system |
| CN112769976B (en) | 2021-01-13 | 2023-10-24 | 网宿科技股份有限公司 | Domain name resolution method and system |
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